Issue 51156 - RFE - add bootstrap credentials to repl
     agreement
    
    Description:  When using Bind DN Groups for a replication agreement
                  authentication there are cases where the group is not
                  present, or is outdated.  In such cases having bootstrap
                  credentials can allow replication to start working again.
                  New replication sessions will always try and use the
                  default credentials first.
    
    relates: https://pagure.io/389-ds-base/issue/51156
    
    Reviewed by: ?